MoCap | motion capture using a OptiTrack NatNet system | Data Visualization library

by davidjonas HTML Version: Current License: No License

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kandi X-RAY | MoCap Summary

MoCap is a HTML library typically used in Analytics, Data Visualization applications. MoCap has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Exploration of motion capture using a OptiTrack NatNet system

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MoCap has a low active ecosystem.

It has 12 star(s) with 6 fork(s). There are 4 watchers for this library.

It had no major release in the last 6 months.

There are 2 open issues and 1 have been closed. On average issues are closed in 2 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of MoCap is current.

Quality

MoCap has no bugs reported.

Security

MoCap has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

MoCap does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

MoCap releases are not available. You will need to build from source code and install.

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MoCap Key Features

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MoCap Examples and Code Snippets

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Community Discussions

Trending Discussions on MoCap

GPflow, bvh: ValueError: mean must be 1 dimensional

How to convert 3D pose sequences to the bvh file format?

MCS Character mouth remains open after assigning mocap

Create animation videos from 3D joint positions

With_Options not executing properly

passing arguments between files

QUESTION

GPflow, bvh: ValueError: mean must be 1 dimensional

Asked 2020-Jan-26 at 16:03

I am having a weird "ValueError: mean must be 1 dimensional" when I am trying to build a Hierarchical GL-LVM model. Basically I'm trying to reproduce this paper: Hierarchical Gaussian Process Latent Variable Models using GPflow.

Therefore I implemented my own new model as follow:

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ANSWER

Answered 2020-Jan-20 at 14:47

I would recommend posting a working MWE code. I have tried to use your code snippets, but it gives me errors.

I don't have issues with multivariate_normal function. If you have localised the issue correctly you can debug TF2.0 more thoroughly and find the place that causes that exception. Here is the code which I'm running:

Source https://stackoverflow.com/questions/59824619

QUESTION

How to convert 3D pose sequences to the bvh file format?

Asked 2020-Jan-02 at 01:32

I am very new to animation and rendering softwares, so please let me know if I need to provide more information about this. I have a sequence of 3D positions of human joints (basically mocap data), representing different kinds of walking. I have managed to visualize the sequence using python, as I have shown in this video. Each data I have is a numpy array of size TxJx3, where T is the number of frames, J is the number of joints (21 in my case), and 3 represents the 3 co-ordinate values. So my question is, how can I convert these 3D positions into a BVH file, that I can load into blender? Or convert them to any other format so that I can load these data in blender?

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ANSWER

Answered 2020-Jan-02 at 01:32

OK, found the solution myself. Posting here in case anyone else finds this useful. Please excuse the absence of LaTeX rendering, apparently, stack overflow does not support it (yet), and I'm too new here to be able to attach images.

So, in the BVH format, the following relationship holds between the joints:

$$pos_j = R_{P(j)}offset_j + pos_{P(j)}$$

where $pos_j$ indicates the 3D position of joint $j$, $P(j)$ returns the parent of joint $j$ in whatever DAG the positions are modeled in (generally the DAG starts at the root and points towards the end-effectors) $offset_j$ indicates the offset of joint $j$ relative to its parent $P(j)$ (aka the connecting limb), and $R_{P(j)}$ is the 3D rotation that determines how much should $offset_j$ be rotated from an initial pose (generally a T-pose). In the BVH format, for each parent $P(j)$, we need to store $R_{P(j)}^{-1}R_j$.

The main trouble I had then was working with joints that had multiple children, for example, the root joint, which has connections to both legs as well as the spine. I eventually came across this repo and digging through their function forward_kinematics inside skeleton.py, realized what to do. Basically, for joints with multiple children, I had to make copies with $offset=0$, and assign those as parents of the corresponding chains. Thus I made 3 copies of the root: one became the parent for the left leg chain, one for the right leg chain, and one for the spine. And similarly for the other parents with multiple children. And yes, the visualization works great!

Source https://stackoverflow.com/questions/59550467

QUESTION

MCS Character mouth remains open after assigning mocap

Asked 2018-Nov-11 at 16:54

I have MCS Female Character where I can assigned Mocap to my character. I have downloaded Mixamo animation and assigned this to the character but the problem is, the character mouth remains open. I am not 3D Artist or Animation guy, so here are my question.

How can I solve mouth open problem in unity?
What is the reason that mouth is open? Either mocap data has open the mouth or what else problem?

I have also assigned Huge Mocap FBX library animation to my character but problem is still same.

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ANSWER

Answered 2017-Nov-07 at 06:29

Go To M3D character manager component in your character
Go to Advanced
Check (True) Force Jaw Shut

Thanks to MCS team for answer

Source https://stackoverflow.com/questions/47069938

QUESTION

Create animation videos from 3D joint positions

Asked 2018-Nov-10 at 11:04

Sorry if some parts of the question or my followup requests may seem silly, but I am not experienced at all in this field and unfortunately I am on a deadline.

The idea is simple to explain, I have (frame-by-frame) exact 3D coordinates of 25 joints of a Human body. What I require is the corresponding animation video of a human character around it. The idea is similar to this - https://www.youtube.com/watch?v=RPrdDlQXjEg

The difference is that I have frame by frame 3d joint values, not mocap data. Also I want to repeat the process for a huge number of videos so I guess I cannot be doing it manually for every video (again my presumption, if I am wrong let me know).

I have no experience whatsoever in this field. It may seem like I did no research prior to asking this question, but I truely did. It's just that I am really confused as to what my options are and whether it is doable or not.

I don't expect a detailed answer (although if I got one that would be awesome). I am just looking for someone to point me to the right tutorials. Thank You.

Edit : Discussion continued - https://blender.stackexchange.com/questions/122369/create-animation-videos-from-3d-joint-positions

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ANSWER

Answered 2018-Nov-05 at 02:56

Mocap data is just a collection of points moving in time, data from a mocap system may be formatted better than the data you have, so it could be easier to say these points are the left elbow and these are the right ankle. If you can't specify that this sequence of points is this joint in the armature, you can expect troubles.

Let's start by saying you have a sequence of locations clearly identified for each tracking marker by name. Start by creating an empty that recreates each marker.

Source https://stackoverflow.com/questions/53139066

QUESTION

With_Options not executing properly

Asked 2018-Sep-04 at 14:40

I have a module for validations and multiple types of products. In this module I would like to store the conditions for the MOCAP product type.

These validations should run only if product_type_mocap? is true. However they run even if it is false... Does anyone have any ideas why? I can give further details as necessary

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ANSWER

Answered 2018-Sep-04 at 14:40

Have you tried a different syntax? Or possibly a lambda for the if? e.g.

Source https://stackoverflow.com/questions/52166589

QUESTION

passing arguments between files

Asked 2018-Feb-25 at 21:03

I have two python QT apps - MainApp and Editor. I want both to be able to run independently so that you can run Editor by itself or you could open editor from mainApp and pass its arguments to the editor.

mocap code:

first.py

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ANSWER

Answered 2018-Feb-25 at 21:03

The editor __init__() method takes a string (myArg) and an optional parent, and you give it an MainApp (self) and a string. The MainApp can't be converted in string so you have a TypeError.

I think you misunderstood the self parameter of the method __init__(). You don't have to provide it yourself, because Python gives the object that is currently being initialized to the method. Just changing this line should work:

Source https://stackoverflow.com/questions/48978106

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